Third-party peptide testing · Cambridge, Cambridgeshire
What is actually in the vial.
Send us a sample and we report its purity and its identity, with the traces behind both. Your customers get a certificate they can verify — not your word for it.
The record so far
- 10
- Certificates issued
- 99.80%
- Mean purity reported
- 2 days
- Turnaround, slowest case
- 10/10
- Results above 98.0%
Every one published in full, with chromatogram and mass data.
Lowest single result: 99.54%.
Mean 2 days from sample receipt to report.
Batches below the threshold are reported, not withheld.
Check a certificate
Every result above is published in full and can be checked against our record by the search code printed on it.
How the work is done
- Purity and identity in a single run
- LC-MS
- Detection wavelength
- 214 nm
- Reporting threshold
- 98.0%
- One certificate per sample
- 1 : 1
HPLC-UV coupled with mass spectrometry (LC-MS)
Where the peptide bond absorbs. Purity is the area percent of the main peak against total integrated area.
Below this we still issue the certificate. The result belongs to the sample, not to whoever paid for the test.
Each sample gets its own accession number. No pooled documents covering a batch.
What we test
Purity
Reverse-phase HPLC with UV detection. You get the area percent of the main peak and the chromatogram it came from.
RP-HPLC-UV · 214 nm
Identity
Mass spectrometry against the theoretical mass for the sequence. Confirms the vial holds what the label says.
ESI-MS
Net content
How much peptide is actually in the vial, by mass — not just a percentage. It is what your customer is paying for.
Gravimetric
Why an outside laboratory
A certificate signed by whoever made the product answers the wrong question. The buyer is not asking what you claim — they are asking who checked.
We do not make peptides and we do not sell them. That is the whole point: nothing here gains from a number coming out high.
Send a sample